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New axes for the stellar mass fundamental plane

Published online by Cambridge University Press:  09 May 2016

Paul L. Schechter
Paul L. Schechter*
Affiliation:
MIT Kavli Institute Cambridge, MA 02139, USA email: schech@mit.edu
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Abstract

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We argue that the stellar velocity dispersion observed in an elliptical galaxy is a good proxy for the halo velocity dispersion. As dark matter halos are almost completely characterized by a single scale parameter, the stellar velocity dispersion tells us the virial radius of the halo and the mass contained within. This permits non-dimensionalizing of the stellar mass and effective radius axes of the stellar mass fundamental plane by the virial radius and halo mass, respectively.

Keywords

galaxies: ellipticalscaling relations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 35 - 38
Copyright
Copyright © International Astronomical Union 2016 

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